Normal forms and global phase portraits of quadratic and cubic integrable vector fields having two nonconcentric circles as invariant algebraic curves
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DOI: 10.1080/14689367.2016.1263600
Abstract: ABSTRACT In this paper, we give the normal form of all planar polynomial vector fields of degree d ≤ 3 having two nonconcentric circles C1 and C2 as invariant algebraic curves and the function ,… read more here.
Keywords: vector; circles invariant; nonconcentric circles; two nonconcentric ... See more keywords